繁體中文
蔡家齊是香港自由式輪滑（滾軸溜冰）教練，現任香港自由式輪滑集訓隊總教練，並為香港滾軸溜冰學校總教練及負責人。他專注滾軸溜冰運動，擁有超過十五年教學經驗，是唯一一位四度獲香港體育學院頒發精英教練獎的滾軸溜冰教練；多年來他為香港培育大批滾軸運動員，並帶領超過十位運動員取得香港體育學院個別精英運動員資助資格。他亦是滾軸溜冰教學書籍《溜轉歲月—滾軸溜冰技術指導》的作者。
2016年，他接受政府新聞網訪問，講解自由式輪滑「速度繞樁」項目的規則：選手須在十二米直線助跑後，以單腳S形步法穿越二十個相距八十厘米的雪糕筒，踢到雪糕筒會被加時。2023年杭州亞運會，他隨香港滾軸運動－滾軸溜冰隊出任教練。他於2019年在九龍灣開辦香港滾軸溜冰學校，其後學校遷入大型商場，佔地超過二萬五千平方呎，成為本地規模最大的室內滾軸溜冰學校之一，提供競賽技巧、團隊領袖訓練及一般應用等課程。
新冠疫情期間，他多次就體育處所關閉對訓練的影響發聲，指出滾軸溜冰與游泳相似，運動員必須到場地訓練，疫情令港隊備戰亞運大受影響；他亦提到在戶外場地限制人數下，教練只能在場邊以望遠鏡觀察運動員。他長年結合教學、青訓與代表隊工作，推動滾軸溜冰在香港的普及與競技發展，並希望提升該項運動在社會上的形象與地位。
English
Choy Ka-chai is a Hong Kong freestyle inline skating (roller skating) coach, head coach of the Hong Kong freestyle slalom training squad and head coach and proprietor of the Hong Kong Roller Skating School. He has more than fifteen years of teaching experience and is the only roller skating coach to have won the Hong Kong Sports Institute's Elite Coach Award four times; he has trained a large number of local skaters and helped more than ten of them qualify for the institute's individual elite athlete funding. He is also the author of a roller skating technique book. In 2016 he explained the rules of speed slalom on the government news portal: skaters sprint twelve metres, then weave through twenty cones spaced eighty centimetres apart on one foot in an S-shape, with time penalties for knocking cones. He served as a coach with the Hong Kong roller skating squad at the 2023 Hangzhou Asian Games. In 2019 he opened the Hong Kong Roller Skating School in Kowloon Bay, which later moved into a large shopping mall with more than 25,000 square feet of floor space, making it one of the biggest indoor roller skating schools in the territory, offering competition skills, team leadership training and general skating courses. During the COVID-19 pandemic he repeatedly spoke out about how the closure of sports facilities hurt training, comparing roller skating to swimming in that athletes must practise on a rink, and noting that capacity limits left coaches watching skaters through binoculars from the sidelines. He has combined teaching, youth development and national-team work to promote both the recreational and competitive sides of the sport.
